Card Reader says All Write Protected

[Guest LMO]

Aloha all. I have a Card Reader in my computer. It reads 9 different types

of memory cards. I use SD, 1GB cards. When I put them in they are read fine,

but whenever I try to write to the card I am told the card is write

protected. It is not. I have the tab in the correct position...have tried in

both ways. Nothing I can do to get the system to see the card as

unprotected.

What can I do?

Thanks!